Cosmic Seaweed Puzzle

Match the sides along the edges dark to dark or light to light to make organic shapes reminiscent of seaweed, though I also see planets in space sometimes.  Alternately, match the sides light to dark and dark to light (41 different solutions).  In addition, there are additional challenges like making a dark circle, a light circle, or a checkered circle.  You can also find a jellyfish or a shark.  This is a tougher one!

• red alder and black walnut wood
• 12 pieces
• 57 solutions
  
• 5″ x 4″ (13cm x 11cm)
• difficulty level:  8 out of 10